PATENTS AND RESEARCH-AND-DEVELOPMENT - IS THERE A LAG

[1] ABEL AB, 1984, R D PATENTS PRODUCTI, P261

[2] [Anonymous], 1972, RES INNOVATION MODER

[3] ESTIMATING DYNAMIC RANDOM EFFECTS MODELS FROM PANEL DATA COVERING SHORT-TIME PERIODS [J]. ECONOMETRICA, 1983, 51 (06) : 1635 - 1659

[4] Bound J., 1984, R D PATENTS PRODUCTI, P21

[5] CHAMBERLAIN G, 1978, ANN INSEE, V0030

[6] MULTIVARIATE REGRESSION-MODELS FOR PANEL DATA [J]. JOURNAL OF ECONOMETRICS, 1982, 18 (01) : 5 - 46

[7] CUMMINS C, 1983, UNPUB R D MASTER FIL

[8] EICKER F, 1967, 5TH P BERK S MATH ST, V1

[9] PSEUDO MAXIMUM-LIKELIHOOD METHODS - APPLICATIONS TO POISSON MODELS [J]. ECONOMETRICA, 1984, 52 (03) : 701 - 720

[10] MARKET VALUE, R-AND-D, AND PATENTS [J]. ECONOMICS LETTERS, 1981, 7 (02) : 183 - 187

[1] ABEL AB, 1984, R D PATENTS PRODUCTI, P261

[2] [Anonymous], 1972, RES INNOVATION MODER

[3] ESTIMATING DYNAMIC RANDOM EFFECTS MODELS FROM PANEL DATA COVERING SHORT-TIME PERIODS [J]. ECONOMETRICA, 1983, 51 (06) : 1635 - 1659

[4] Bound J., 1984, R D PATENTS PRODUCTI, P21

[5] CHAMBERLAIN G, 1978, ANN INSEE, V0030

[6] MULTIVARIATE REGRESSION-MODELS FOR PANEL DATA [J]. JOURNAL OF ECONOMETRICS, 1982, 18 (01) : 5 - 46

[7] CUMMINS C, 1983, UNPUB R D MASTER FIL

[8] EICKER F, 1967, 5TH P BERK S MATH ST, V1

[9] PSEUDO MAXIMUM-LIKELIHOOD METHODS - APPLICATIONS TO POISSON MODELS [J]. ECONOMETRICA, 1984, 52 (03) : 701 - 720

[10] MARKET VALUE, R-AND-D, AND PATENTS [J]. ECONOMICS LETTERS, 1981, 7 (02) : 183 - 187